Function Annotations What is it?

Question

And what does mean this sign in Python " ->"
I don't understand English well.
Thank you for using simple words

Answer 1

-> is used to signify the expected return type from a function in python. It is optional.

https://www.python.org/dev/peps/pep-3107/

Example:

https://code.sololearn.com/c9scA7o07x8n/?ref=app

Answer 2

Let's say we have a function that takes 2 numbers, a and b as parameters. You expect the numbers to be of type int so you annotate int as their type like;

def add(a: int, b: int):

Now this function should also return a value of type int, so you declare so like;

def add(a: int, b: int) -> int:
return a + b

Of course all this is optional and you could also just write the function like;

def add(a, b):
return a + b

I suggest you thoroughly read through the link to the PEP I posted above for a better understanding and explanation.

Answer 3

ChaoticDawg
Thank you so much.🙏

Answer 4

anonymous function or arrow function

Answer 5

Both😁

Answer 6

ChaoticDawg
Thank you.
But in fact, I didn't get it. 🤦‍♂️